After 2 days, it still won't work.

I have a form input I'm trying to error check with JavaScript.
Only groups of 5 digits with a single '~' separating them.
For example:

Using the Regex Powertoy the closest I came (I thought) was:

I need some Regex genius to explain a solution, if any.
Thanks

I'd try something different, than the word boundary approach. I'm not entirely sure, if that works for JS, but please try, if this fits your needs:


The idea is to match five figures, which follow either the start of a given string or a ~. To make your "ok case" possible, the optional ~ before the end of the given string is appended to the pattern. Unfortunately, this would allow for a string like 12345~12345~ and you didn't say, what should happen in this case.

Regards, Jens

And makes all kinds of sense, and works perfectly.
It's logically obvious and I should have gotten it.
I never used such an obtuse conditional system before.
I guess, I just couldn't see the forest through the trees.

The "OK" case was just my way of saying that didn't mater if it passed or not. I suppose I'd prefer it didn't, so I pulled "~?".

Thanks a million.